Mold.



No. 680,273. Patentq Aug. 13, um

W. S. PARKER.

MOLD.

(Application filed May 3. 1900.;

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No. 680,273. Patented Aug. I3, l90l. w. s. PARKER.

MOLD.

(Application filed may 3. 1900.) "vdelJ 3 Sheets-Sheet z.

. Patented Aug. l3, IQDI. W. S. PARKER.

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UNITED STATES PATENT OFFICE.

WILLIAM SINK PARKER, OF AUSTIN, TEXAS.

MOLD.

SPECIFICATION forming part of Letters Patent N0. 680,273, dated August13, 1901.

Application filed May 3, 1900. $erial No. 15,393. (No model.)

To (til whom it may concern:

Be it known that LWILLIAM SINK PARKER, a citizen of the United States,residing at Austin, in the county of Travis and State of Texas, haveinvented certain new and useful Improvements in Molds, of which thefollowing is a specification.

My present invention relates to a novel mold intended more particularlyfor the molding of conduits of various forms in plastic ma terial ormaterial which during the operation of molding is in a plastic orviscous state and which after being molded is designed to be hardenedeither while in the mold or after its removal therefrom.

One object of the invention is to produce a mold comprising a pluralityof separable sectional members which may be employed as component partsof molds for certain purposes or as complete molds for the casting ofconduits,having the configuration of asection of the conduit designed tobe cast by the mold in its complete or more extended embodiment.

A further object of the invention is to so construct the mold membersthat they maybe readily Withdrawn from the surface of the castingWithout danger of injury to the surface of the latter.

A further object is to provide efficient means for connecting themembers, and the most important object is to provide means for expandingthe sectional members of the inner shell of the mold and for permittingits contraction when it is desired to remove the mold from contact withthe cast.

To the accomplishment of these several ob-, jects and others subordinatethereto, as will hereinafter more fully appear, my invention consists,essentially, in constructing a mold comprising inner and outerconcentric shells, each comprehending a plurality of separable members,each of which latter comprise a plurality of hingedly connectedrelatively movable sections, suitable means for connecting the membersin a manner to permit their ready separation being provided. Theinvention consists, further, in the em ployment of joint or key sectionsremovably located between the opposing edges of the sectional members ofthe inner shell of the mold and connected by actuating mechanism, bymeans of which they are urged in opposite directions to properly expandthe inner shell and which permits of their retraction and removal topermit the disassociation of the inner shell from the casting, all aswill hereinafter more fully appear.

In the accompanying drawings, Figure 1 is an end elevation or top planview of my mold organized for the casting of a hollow conduit or pipeand showing in dotted lines the retracted positions of the joint membersand the mold-sections deflected upon their hinges to release the cast.Fig. 2 is a diametrical sectional view on the line 2 2 of Fig. 1. Fig. 3is a side elevation of the mold complete. Fig. 4 is an end elevation,partly in section, of one of the mold members organized for employmentas a complete mold. Fig. 5 is a sectional view on the line 5 5 of Fig.4. Fig. 6 is a detail view of a reversible foundation or base plate.Fig. 7 is a detail View of the end gate, and Fig. 8 is a detail view ofone of the foot-plate sections.

Referring to the numerals of reference iu= dicating corresponding partsin the several views, 1 indicates a base or foundation plate of anydesired size or material, upon which my mold is designed to rest duringthe operation of molding. The mold comprehends concentric inner andouter shells 2 and 3 of any desired cross-sectional contour-as, forinstance, cylindrical, polygonal, Ate-but shown in the accompanyingdrawings as oylindrical for the purpose of defining their essentialcharacteristics. These shells may be 'made from any suitable matcrialas,for instance, wood or metalbut are preferably 7 wood, having reinforcingsurfaces or linings of thin sheet metal, the lining on the inner face ofthe outer shell being designated by the numeral 4 and that on theopposed outer face of the inner shell 2 being designated by the numeral5. The outer shell is composed of two separable members 6 and 7,preferably of corresponding contour, and the inner shell 2 is likewisecomposed of two separable members 8 and 9, thecontiguous members of theshells comprehending a member of the mold. Inasmuch as mold membersconstructed as thus far described might in some instances be effectivelyemployed, I will proceed at once with a description of the means which Iemploy for connecting the mold leave joint-spaces 11 and 12 intermediateof the contiguous edges of the shell for the reception of interposedjoint or key members 13 and 14, preferably wedge-shaped, as shown,longitudinally coextensive with the inner shell and of a widthcorresponding to the thickness of the shell, so that when in place thejoint or key members will completely fill the spaces between the edgesof the shell members and Will have their inner and outer faces located'flush with the inner and. outer faces of the shell. At suitable pointsupon the inner faces of the keys or members 13 and 14 are locatedinwardly-extending lugs or ears 15 and 16, to which are pivotallyconnected the outer ends of links 17 and 18, whose contiguous inner endsare likewise pivotally connected to what may be termed a key-rod oractuator 19, located axially within the inner shell and provided at itsupper end with a handle or grip 20, and having its lower end extendedinto proximity to the face of the base-plate 1 for the purpose oflimiting the downward movement of the key-rod 19 in a manner to preventthe projection of the members or keys beyond the outer face of the innershell and into the mold-chamber. The links 17 and 18 and theintermediate key-rod 19 constitute, in efiect, a toggle, designed, asthe key-rod is urged up or down, to release the keys 13 and 14 or tocause them to be wedged firmly between the opposed edges of the innershell for the purpose of urging the shell members to their properrelative positions to constitute a core.

The separable members 6 and 7 of the outer shell or mold proper areretained by lockingbolts 21 and 22, terminally pivoted, respectively,between horizontalsparallel bearingears 23, extending from the outerface of the member 6, for instance, adjacent to its edges. Any number ofthese bolts may be employed at the sides of the mold, according to thelength of the latter; but for the purpose of illustration I have shownonly one bolt at each side. The locking-bolts are designed to be swunginto recesses 24, formed in the locking-lugs 25, which extend from theouter sur-' connection of the edges may be made more complete byproviding one member with a longitudinal tongue 29, extending from itsface and engaging a correspondingly-shaped groove in the opposed edgeface.

The mold constructed as described comprehends a complete embodiment ofmy invention in its broadest aspect, since it comprises a mold composedof separable members, and means for retaining them in proper relation toconstitute a complete mold and core defining an intermediate mold-spaceor cast-chamber for the reception of the plastic or other material fromwhich the cast is to be made; but, as premised, I have made pro- .visionfor efiecting the removal of the memface of the latter.

In the illustrated embodimentof the invention I form the members 6 and 7of the outer shell in two sections, 31 and 32 designating the sectionsof the member and 6 33 and 34 the sections of the member 7, thecontiguous edges of the sections of each member being connected by oneor more hinges 35, located beyond or outside of the shell. The particular manner of mounting the hinges 35 is not essential, provided theypermit the shell-sections to be swung back in opposite directions andlimit their movement inwardly to such an extent as will produce thecontour desired for the mold.

36 indicates ametal strap or band encircling the outer shell and dividedat the edges of the members and sections and secured in any suitablemanner, the object of this band being to stifien the sections of theshell and prevent warping or other distortion when wood "or othersimilar material is employed in. the

manufacture of the mold. Handles 37 may be extended from the band 36upon each section for the purpose of facilitating the removal of themold from the cast, and, as shown, the locking-lugs 25 maybe formedintegral to this band adjacent to the opposite edges of the member 7.The inner shell or core 2 is likewise constructed in sections, themembers 8 and 9 of said core each being composed of two sections 38 and39 and 40 and 41, the section of each member being connected by hinges42, located-adjacent tothe inner periphery of the core orinner shell anddesigned to permit the sections of the members to be swung inwardly awayfrom the inner face of the cast. Attention is here called to the factthat the hinges 35 and 42 are oppositely disposed-that is to say, theyare exterior and tion to the end face of the pipe or conduit cast in themold. Each section of the footplate is supported upon legs 44, and theinner and outer shells of the mold are provided at the-lower edges oftheir contiguous faces with oppositely-extending foot-plate flanges 45,-which extend under the opposite edges of the foot-plate and serve toretain the shells in contact with the foundation or base plate when theplastic or viscous materialis being poured into the mold-chamber 10. Ifpreferred, however, the foot-plates 43 may be made contin uous insteadof sectional, and in some instances it may be desirable to form themintegral with or otherwise fixed to the foundation or base plate, avariation of this latter arrangement being shown in Fig. 6 of thedrawings, wherein I have shown a reversible baseplate provided upon itsopposite faces with foot-plates or end mold-plates of difierent dimensions and designed for use in connection with molds of diiferentforms, one of said foot-plates being designed for use in connection withthe complete cylindrical mold shown in Fig. 1 and the foot-plate on theopposite side of the foundation being designed for use in connectionwith a culvert, to form which I employ only one of the mold membershereinbefore described.

In Fig. 4 of the drawings I have shown one of the mold members employedas a complete mold, the open longitudinal edges of the mold-space, whichin this case is semioylindrical, being closed by an end gate 46,clampedagainst the diametrical face of the member by means of the locking-bolts22, received within terminal recesses 47 in the end plates and drawn upby the jam-nuts 27, which in this organization of parts bear against theouter face of the end gate. The inner face of the end gate is grooved,as indicated at 48, opposite the edges of the outer shell for thereception of the tongues 29, extending there from, and where the cast isdesigned as a section of a transversely-continuous conduit the end gateis provided opposite the mold-chamber 10 with recesses or projections orsuch other contours as is necessary to impart the required shape to theedges of the cast for the purpose of facilitating the interfitting oftwo conduit-sections with break-joints at their over a keeper 50 at the]middle of the inner face of the end gate and likewise hooked at theiropposite diverging ends into keepers 51, extending from the inner facesof the innershell-member sections. The spaces at the oppositelongitudinal edges of the inner shell member constituting one-half ofthe transverse dimension of the joint members or keys l3 and 14 arefilled by means of wedge-shaped longitudinal plug-strips 52, insertedbetween the members of the end gate and the edge faces of the innershell member, said wedge-shaped strips serving also to urge the edges ofthe inner shell member into position.

In operation a mold organized and arranged as shown is filled withconcrete or other material in a plastic state, which completely fillsthe mold-chamber 10, receiving the contigu; ii l,"

ration of such chamber and having its end formed in the desired mannerby the footplate or end mold 43. The plastic material is then allowed toharden until it becomes a cast. When the proper time has arrived, theoperator by pulling upwardly on the handle 20 of the key-rod 19 causesthe keys or joint members 13 and 14 to be urged inwardly toward thecenter of the core and out of contact with the opposed longitudinaledges of the inner shell members 6 and 7. The keys and their connectedactuating mechanism may then be entirely removed by drawing them endwiseout of the cast, after which the sections of the members may be swunginwardly away from the inner face of the cast, and after the separationhas been completely effected the inner shell members may be likewisewithdrawn from the interior of the cast without liability of injury tothe surface of the latter, it being observed that the inward movement ofthe member-sections withdraws the flanges 44 from beneath the inneredges of the foot-plates. The mold-core or inner shell having beenentirely removed, it only remains to release the locking-bolts 22byunscrewing the nuts 27 and swinging them out of engagement with thelocking-lugs. The operator now completes the disorganization of the moldby grasping the handles 37 and swinging the sections of the outer shellmembers away from the outer face of the cast, simultaneously withdrawingthe flanges 44 from beneath the outer edge of the foot-plate. Thecomplete cast is then lifted from the footplate, and the mold is readyfor reorganization and a repetition of the operation just described. Itmay be mentioned in passing, however, that when the mold is beingorganized the expansion of the joint members or keys 13 and 14 betweenthe contiguous edges of the inner shell members is effected by urgingthe key-rod 19 downwardly, the togglekey-aetuating device serving towedge the keys between the members to urge the latter into their properpositions and to retain them rigidly in place. When a single member isto be employed as a complete mold, the oper ation of molding is carriedout substantially IIO plete mold; but while the present embodiment of myinvention is at this time deemed preferable I do not desire to limitmyself to the structural details defined, but reserve the right toeffect such changes, modifications,

and variations as may come properly within the scope of the protectionprayed, as it is obvious that the mold might be constructed in variousforms to produce conduits or other articles of the desired contour andthat the movable sections of the several members might be variouslyproportioned and arranged to accommodate the removal of the mold fromthe cast in accordance with the peculiarities of the contour of thelatter.

What I claim is- 1. A mold comprising inner and outer shell members eachcomposed of hinged sections, means for drawing the edges of the outermember into position, and means for urgingthe inner member intoposition.

2. A mold comprising an outer shell member composed of eXteriorly-hingedsections,- an inner shell member composed of interiorlyhinged sections,means for drawing the edges of the outer member into position, and meansfor urging the inner shell into position.

3. A mold comprising inner and outer shells, the inner shell beingcomposed of members each comprising hinged sections, and means forurging apart the members of the inner shell.

t. A mold comprising inner and outer shells, the inner shell beingcomposed of a plurality of members each comprisingv interiorly-hingedsections, joint members interposed between the opposed edges of theinner shell members, and means for urging the joint members in oppositedirections to exes'qa're pand the inner shell or to permit itscontraction.

5. A mold comprising separable members each composed of an outer shellhaving exteriorly-hinged sections, and an inner shell havinginteriorlyhinged sections, means for drawing the outer shell memberstogether, and means for urging the inner shell members apart.

6. A mold comprising separable members each composed of an outer shellhaving exteriorly-hinged sections, and an inner shell havinginteriorlyhinged sections, means for drawing the outer shells of themembers together, joint members intermediate of the opposed edges of theinner shells of the members, and means forurging the joint members inopposite directions to expand the inner shell or topermit itscontraction.

7. .A mold comprising separable members each composed of an outer shellhaving exteriorly-hinged sections, and an inner shell havinginteriorly-hinged sections, locking-bolts pivotally connected to theouter shell of one section, recessed locking-lugs projecting from theouter shell of the contiguous member and designed to receive thelocking-bolts, jamnuts carried by said bolts,wedge-shaped joint membersintermediate of the contiguous edges of the inner shells of thecontiguous members, a longitudinally-movable key-rod,- and linkspivotally connected at their oppo site ends to thekey-rod and jointmembers.

8. A mold comprising a base=plat-e, inner and outer flanged shells, andan intermediate foot-plate extending over the flanges of the shells;

9. A reversible base-plate for molds provided with foot-plates on itsopposite faces.

10. A mold comprising inner. and outer shell members, each composed ofhinged sections, means for drawing one of said members into position,and means for urging the other member into position.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

WILLIAM SINK PARKER.

Witnesses:

J. BoULDIN REoToR, W. F. MOGEHEE'.

